Aqueous solutions of a compound did not form precipitates with Cl^-, Br^-, I^-, SO₄²^-, CO₃²^-, P O₄³^-, OH^-, or S²^-. This highly water- soluble compound produced the foul- smelling gas H₂S when the solution was acidified. This compound is . A) AgNO₃ B) Pb(NO₃)₂ C) Li₂CO₃ D) (NH₄)₂S E) KBr

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The fact that the compound produces a foul-smelling gas when acidified indicates the presence of HS- ions, which are characteristic of sulfides. The compound did not form precipitates with Cl-, Br-, I-, SO4 2-, CO3 2-, PO4 3-, OH-, or S2O3 2-, indicating that the cation is not Ag+, Pb2+, Li+, or K+. Therefore, the only remaining option is (NH4)2S, which is highly water-soluble and can produce HS- ions when acidified.

Aqueous Solutions of a Compound Did Not Form Precipitates with Cl-

Aqueous Solutions of a Compound Did Not Form Precipitates with Cl^-